Field Notice: FN - 62423 - 15454-CE-1000-4 Card Gets Burst Data from Incoming Source to FPGA of the CE-1000-4 Card Causing the Upper Layers of the Source to Resend

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Updated:October 30, 2006

Document ID:FN62423

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Revised October 30, 2006

June 22, 2006

NOTICE:

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.

Products Affected

Products Affected	Top Assembly Part Number	Comments
15454-CE-1000-4	800-26814-01	800-26814-02 and later are not impacted by this issue.
15454-CE-1000-4=	800-26814-01	800-26814-02 and later are not impacted by this issue.
15454E-CE-1000-4	800-26814-01	800-26814-02 and later are not impacted by this issue.
15454E-CE-1000-4=	800-26814-01	800-26814-02 and later are not impacted by this issue.

Problem Description

When connected to a Catalyst 6000 (CAT6K), or any source that has incoming burst data, the CE-1000-4 card can drop traffic when exposed to bursting data after internal buffers of the CE-1000-4 are filled.

The last frame of burst data received gets stuck in the internal FIFO. This frame then gets pushed out of the FIFO by the next burst of data coming in, thus creating out of sequence frames at the CAT6K receiver and causing the upper layers to resend.

Background

We found that the last frame of burst data received always gets stuck in the internal FIFO. This frame gets pushed out of FIFO by the next burst of data coming in.

When we connect the CE-1000-4 with the CAT6K, the CAT6K is sending 100 frames of burst data towards the CE1000-4.

In the first burst of the data, the CAT6K is going to receive back only 99 of the 100 frames. One frame will be stuck in the CE-1000-4.

Problem Symptoms

The last frame of burst data received gets stuck in the internal FIFO of the CE-1000-4. This frame then gets pushed out of FIFO by the next burst of data coming in, thus creating out of sequence frames at the CAT6K receiver and causing the upper layers to resend.

Workaround/Solution

Have the defective cards replaced.

With the new FPGA release, the issue has been fixed. Now all the frames are passing and none of them get stuck in the internal FIFO of the 15454-CE-1000-4 card.

DDTS

To follow the bug ID link below and see detailed bug information, you must be a registered user and you must be logged in.

DDTS	Description
CSCsd94528 (registered customers only)	CE1000 connected to Cat 6500 causes intermittent packet drops

How To Identify Hardware Levels

To determine the Part Number of your ONS 15454-CE-1000-4 cards:

Open Cisco Transport Controller.

From the Shelf View, select Inventory

From the Inventory tab, locate the CE-1000 boards and compare the information from the Inventory tab against the Products Affected.

If you are using TL1 commands:

1. >ACT-USER::

2. >RTRV-INV::ALL

3. >CANC-USER::

Compare the information from the TL1 inventory command against the Products Affected section above.

Revision History

Revision	Date	Comment
1.1	30-OCT-2006	Clarified Products Affected Comments
1.0	22-JUN-2006	Initial Public Release

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

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